<agm-map [latitude]="lat" [longitude]="lng" [styles]="mapStyle === 'dark' ? styleDark : styleLight">
.
.
.
</agm-map>
В вашем TS вы будете иметь логику для переключения стилей или вы можете установить стиль по умолчанию
public darkStyle = [
{
"elementType": "geometry",
"stylers": [
{
"hue": "#ff4400"
},
{
"saturation": -100
},
{
"lightness": -4
},
{
"gamma": 0.72
}
]
},
{
"featureType": "road",
"elementType": "labels.icon"
},
{
"featureType": "landscape.man_made",
"elementType": "geometry",
"stylers": [
{
"hue": "#0077ff"
},
{
"gamma": 3.1
}
]
},
{
"featureType": "water",
"stylers": [
{
"hue": "#000000"
},
{
"gamma": 0.44
},
{
"saturation": -33
}
]
},
{
"featureType": "poi.park",
"stylers": [
{
"hue": "#44ff00"
},
{
"saturation": -23
}
]
},
{
"featureType": "water",
"elementType": "labels.text.fill",
"stylers": [
{
"hue": "#007fff"
},
{
"gamma": 0.77
},
{
"saturation": 65
},
{
"lightness": 99
}
]
},
{
"featureType": "water",
"elementType": "labels.text.stroke",
"stylers": [
{
"gamma": 0.11
},
{
"weight": 5.6
},
{
"saturation": 99
},
{
"hue": "#0091ff"
},
{
"lightness": -86
}
]
},
{
"featureType": "transit.line",
"elementType": "geometry",
"stylers": [
{
"lightness": -48
},
{
"hue": "#ff5e00"
},
{
"gamma": 1.2
},
{
"saturation": -23
}
]
},
{
"featureType": "transit",
"elementType": "labels.text.stroke",
"stylers": [
{
"saturation": -64
},
{
"hue": "#ff9100"
},
{
"lightness": 16
},
{
"gamma": 0.47
},
{
"weight": 2.7
}
]
},
{
"featureType": "water",
"elementType": "geometry",
"stylers": [
{
"color": "#222222"
}
]
},
];
public defaultStyle = [];